Error 406 - Not Acceptable

An error has occurred. Generally a 406 error is caused because a request has been blocked by Mod Security. If you believe that your request has been blocked by mistake please contact the web site owner.

I have tried http://www.inmotionhosting.com/support/website/modsecurity/find-and-disable-specific-modsecurity-rules . I can do the first step and second one. I can see similar kind of results for the jquery.cookie.js file. But can't disable it, as the 3 command says no such file or directory.

When following step 3 on those instructions, did you also read and follow this part?

Note that when we use >> this is going to append the rule to our ModSecurity configuration file, so we don't overwrite any previous rules we've allowed as well. If you don't already have your ModSecurity configuration file included in your Apache configuration, be sure to follow my guide on how to enable ModSecurity include and create a configuration file which covers this.

It's also important to remember you can't have the SecRuleEngine Off rule still in your ModSecurity configuration file if you're just disabling specific rules, as it will completely turn off ModSecurity.